Big Break Marina is a naturally scenic, accessible gateway to the Delta with a storied past. With renovated docks and like-new launch ramps, carefully cultivated landscape, and a fresh coat of paint just about everywhere, we know you’re going to love the new Big Break Marina as much as we do.

Summer time brings good trout and striped bass fishing. The reservoir is currently storing 115,000 acre feet, 72 percent of capacity. Pumping has stopped for now. The water temperature is at 73º in the summer months

Located next to the dam, the center tells the history of the Los Vaqueros area, shows how the dam was built and describes the many animals that make the watershed their home.

Winter-Spring Activity Guide (PDF)

A family run resort for more than 50 years, Orwood Resort is the perfect spot to experience Northern California’s best water skiing and wake boarding venue only 60 miles east of San Francisco. From safe campgrounds to boating, Orwood Resort has it all. Secure, dry storage units for your boat are also available for rent. A General Store caters to all your needs and our new, 3 lane boat launch ramp can’t be topped.

The area that is now Round Valley Regional Preserve was once home to California Indians. It was probably a boundary between several different tribal groups, an area where members of East Bay and San Joaquin Valley groups met periodically to trade and socialize. Evidence of Native American use has been uncovered at several archaeological sites within the valley.

Park Activities:
The preserve is open for hiking, horseback riding and bicycling (with some restrictions). The climate at the preserve is arid and temperatures commonly exceed 100º in the summer months. Be prepared for the summer heat: use sunscreen, wear a hat and loose-fitting clothing and wear good hiking shoes. Drinking water is available at the staging area. Be sure to carry plenty of water with you during your hike.

Vasco Caves Regional Preserve exists because of the combined efforts of the East Bay Regional Park District and the Contra Costa Water District. The property was jointly acquired by both agencies and is operated by the Park District in agreement with CCWD. All access is by advance reservation guided tours only. The Preserve is not open to general public access in order to protect the Reserve's unique resources.

Resting in a pristine valley east of San Francisco, Los Vaqueros Dam was the first major water project built in California in more than 15 years. The key reason for its success has been the Contra Costa Water District's commitment to mitigate all environmental impacts to less than significant levels.